1923 in Northern Ireland

Incumbents

• Governor - The Duke of Abercorn
• Prime Minister - James Craig

Events

• 1 April – The Provisional Government of Ireland establishes customs posts on the border with Northern Ireland.
• 28 May – The government releases two captured documents issued by the IRA on 24 May. The letters, signed by Éamon de Valera and Frank Aiken call for the dumping of arms and the ending of armed struggle. The Civil War is officially over.
• The Church of Ireland parish church of St. Anne in Enniskillen is raised to the dignity of the cathedral church of St. Macartin.

Sport

Football

• International
• Irish League
• Irish Cup
• Belfast side Alton United of the Falls District League are shock winners of the Free State Cup beating Shelbourne 1–0 in the final at Dalymount Park. Clubs and leagues in nationalist areas of Northern Ireland had affiliated to the FA of the Irish Free State after the 1921 split from the Belfast-based Irish Football Association.
• Newry Town Football Club is founded.

Births

• 24 January – Donald Murray, Lord Justice of Appeal of the Supreme Court of Northern Ireland.
• 1 February – Sir John Gorman, Ulster Unionist Party MLA for North Down.
• 12 February – James Chichester-Clark, Fifth Prime Minister of Northern Ireland.
• 12 April – Barry Shaw, barrister, first Director of Public Prosecutions for Northern Ireland
• 24 May – Siobhán McKenna, actress.
• 20 September – Geraldine Clinton Little, poet.
• 3 November – Tomás Ó Fiaich, Cardinal Archbishop of Armagh and Primate of All Ireland 1978-1990

Full date unknown

• F. S. L. Lyons, historian.
• Sean McAloon, Uilleann piper and pipe maker.